The Science of Sex by Phillip Petersen & Phillip Petersen

The Science of Sex by Phillip Petersen & Phillip Petersen

Author:Phillip Petersen & Phillip Petersen [Petersen, Phillip]
Language: eng
Format: azw3
Published: 2019-01-06T16:00:00+00:00



During the plateau phase, the rigidity of the male's erection increases, the head of his penis enlarges modestly, and his testes become enlarged and pulled up closer to the body. Preejaculatory fluid may appear. A sex flush occurs in about a quarter of males.

Meanwhile, in the female, vaginal lubrication continues, but may wax and wane. An orgasmic platform forms at the outer third of the vagina. The cervix and uterus elevate further. The inner two-thirds of the vagina lengthens and expands further. The clitoris slips under the clitoral hood, a fold of skin at the top of the labia. (This may lead a man to assume his partner isn't fully aroused and a woman to believe her clitoris is too small to be seen. Although the clitoris is small—about the size of a pea—it is very sensitive, and this hood protects it so it can be stimulated without discomfort.) The lips of the vagina become more swollen and change colour. The sex flush intensifies and spreads more widely. There is a further increase in breast size and the areola enlarges.

In both sexes, heart rate and blood pressure increase further, breathing may become more shallow and rapid, there is a further increase in neuromuscular tension, but visual and auditory acuity are diminished. Both males and females may use voluntary contraction of the rectal sphincter as a stimulative technique at this stage.

Though there are a few societies where kissing is completely unknown and others where it's considered disgusting and unsanitary, for most people, kissing is a major part of foreplay. Humans are not alone in this; most mammals, some fish, birds and lizards indulge in some form or 'kissing', licking, nuzzling, nibbling or biting. But if a kiss can be a great turn-on, it can also be a sure turn-off. Start with a kissable mouth; bad breath can quickly destroy desire. As with most touch sensations in sex, an initial teasing and titillation (gentle kissing, licking and sucking) is apt to be more stimulating than a direct assault. Varying the pace and degree of hardness will also enhance and maintain stimulation. As with all sex activities, force has little place in kissing. In particular, don't force your tongue into your partner's mouth; he or she will allow it to fall open naturally when ready for the French kiss—which should always be a light exploration rather than a ramming in.

One of Kinsey's truer observations was that 'there is no part of the human body that is not sufficiently sensitive to effect erotic arousal and even orgasm for at least some individuals in the population'. Actually, this is a slight exaggeration, since it is only skin and modified skin, with associated nerve endings, which respond erotically to touch. However, there are sexual hot spots (erogenous zones) which are particularly likely to evoke an erotic response if suitably stimulated. These may vary considerably from person to person and even in the same person from time to time, but common spots are the mouth, lips and tongue, the perineum, the earlobes and the thighs.


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